It's not a cop out if there isn't any CCTV; it's your word against his.
I was threatened offline by someone on here. There was text message evidence. Threatening. The best they (police) reckoned they could do was caution (unofficial) the fella as he claimed it was a member of staff.
You'll be lucky if they threaten him with anything, it's your word against his. They won't bother, I wouldn't.
The guy that threatened me was Scottish, from Perth. First name Gordon.